This paper presents the use of Cellular Automata (CA) for modelling micro abrasive machining. A onedimensional CA was initially used to model the workpiece, as having different heights, to represent the roughness; and the forces from the abrasive grits were modelled to randomly erode the workpiece, as such smoothening out and polishing the surface. The modelling was then extended further to two...

An in vitro study was conducted to evaluate the abrasive wear resistance of high-strength denture teeth (HS teeth). Eight types of specimen were used in the experiments; 3 types of HS teeth, 3 types of conventional plastic denture teeth (PL teeth), porcelain teeth and metal teeth. Sliding-induced wear tests were conducted by sliding the samples on a metal plate. The abrasive wear resistance of ...

Abrasive water jet machine (AWJM) is a mechanical base non-conventional machining process. This is process of removal of materials by impact erosion of high pressure (1500-4000 bar), high velocity of water and entrained high velocity of grit abrasives on a work piece. Experimental investigations were conducted to assess the influence of abrasive water jet machining (AWJM) process parameters on ...

In the present paper an indirect model based on neural networks is presented for modelling the rough honing process. It allows obtaining values to be set for different process variables (linear speed, tangential speed, pressure of abrasive stones, grain size of abrasive and density of abrasive) as a function of required average roughness Ra. A multilayer perceptron (feedforward) with a backprop...

Waterjet technology has been extensively used in machining processes since 1970’s, and in the last years it has evolved to a precision machining tool for micro workpieces, namely micro abrasive-waterjet blasting (μAWJB); nevertheless, as a finishing process to remove micro-burrs it has not been yet developed. Our experimental studies on low-pressure μAWJB showed that conventional nozzles which ...

Deburring of cross-drilled holes by secondary erosion of an abrasive jet was carried out and the parameters were identified. The detailed studies carried out on the parameters indicate that the parameter stand-off distance, burr root-to-stopper distance, abrasive grit size and mixing ratio significantly affect the deburring process. A burr model for 90° cross-drilled holes is also presented in ...

We present an alternative method for cutting optical glass. It works with a high-pressure fluid, carring abrasive powder. This technique offers some advantages over conventional methods that use diamond abrasive covered wires or disks. We make a critical comparison between those two techniques, characterizing cuts with interferometric, polarimetric, and Ronchi testing. The main feature of the w...

Pliant abrasive media is transforming the way coating maintenance personnel approach offshore surface preparation. Pliant media users are often able to lower total job costs and provide higher quality surface preparation. 29(59,(:#2)#2))6+25(#0$,17(1$1&( Millions of dollars are being allocated toward the maintenance of offshore platforms with the goal to maximize oil production operations. A mo...

Form accuracy of a machined component is one of the performance indicators of a machining process. Ultrasonic micromachining is one such process in which the form accuracy of the micromachined component significantly depends upon the form stability of tool. Unlike macromachining, a very small amount of tool wear in micromachining could lead to considerable changes in the form accuracy of the ma...

The wide adoption and reuse of existing biomedical ontologies available in various libraries is limited by the lack of suitable tools with metrics for their evaluation by both naïve users and expert ontologists. Existing evaluation tools perform technical evaluation of the structure of an ontology as presented by its design and knowledge representation. These find little use in evaluating the p...